Hobro, Alison J., Jabeen, Saima, Chowdhry, Babur Z. and Blanch, Ewan W. (2010) Time dependence of SERS enhancement for pyrimidine nucleosides. Journal of Physical Chemistry C, 114 (16). pp. 7314-7323. ISSN 1932-7447 (Print), 1932-7455 (Online) (doi:10.1021/jp908968h)

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Abstract

The effects of chemical components in a SERS sample preparation on the time scale of the SERS enhancement process have not previously been examined in detail. In this report the effects of the nature and concentration of aggregating agent as well as the concentration of both colloid and analyte on the time dependence of SERS enhancement and on the spectral profiles observed for the pyrimidine nucleosides cytidine and uridine are characterized. In conjunction with hydrodynamic diameter and zeta-potential measurements the differences in SERS enhancement profile with time observed for the aggregating agents studied (KCl and K2SO4) are ascribed to two competing processes affecting the SERS substrate nanoparticles. The first being the conventional aggregation process and the second being an equilibrium between smaller and larger aggregates which is influenced by the presence of Cl- ions.

Item Type:	Article
Additional Information:	[1] Publication Date (Web): March 29, 2010 [2] First published in print: April 29, 2010. [3] Published as: The Journal of Physical Chemistry C, 2010, 114 (16), pp 7314–7323. [4] This article is part of the C: Martin Moskovits Festschrift special issue of The Journal of Physical Chemistry, April 29, 2010, Volume 114, Issue 16.
Uncontrolled Keywords:	raman-scattering, silver colloids, spectroscopy, spectra, sols, derivatives, cytidine, cytosine, ph
Subjects:	Q Science > Q Science (General) Q Science > QP Physiology Q Science > QC Physics
Faculty / School / Research Centre / Research Group:	Faculty of Education, Health & Human Sciences > School of Human Sciences (HUM)
Related URLs:	Publisher Organisation
Last Modified:	09 Oct 2021 04:46
URI:	http://gala.gre.ac.uk/id/eprint/3585

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